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Commit | Line | Data |
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1da177e4 LT |
1 | /**************************************************************************/ |
2 | /* */ | |
3 | /* IBM eServer i/pSeries Virtual Ethernet Device Driver */ | |
4 | /* Copyright (C) 2003 IBM Corp. */ | |
5 | /* Originally written by Dave Larson (larson1@us.ibm.com) */ | |
6 | /* Maintained by Santiago Leon (santil@us.ibm.com) */ | |
7 | /* */ | |
8 | /* This program is free software; you can redistribute it and/or modify */ | |
9 | /* it under the terms of the GNU General Public License as published by */ | |
10 | /* the Free Software Foundation; either version 2 of the License, or */ | |
11 | /* (at your option) any later version. */ | |
12 | /* */ | |
13 | /* This program is distributed in the hope that it will be useful, */ | |
14 | /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ | |
15 | /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ | |
16 | /* GNU General Public License for more details. */ | |
17 | /* */ | |
18 | /* You should have received a copy of the GNU General Public License */ | |
19 | /* along with this program; if not, write to the Free Software */ | |
20 | /* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */ | |
21 | /* USA */ | |
22 | /* */ | |
23 | /* This module contains the implementation of a virtual ethernet device */ | |
24 | /* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */ | |
25 | /* option of the RS/6000 Platform Architechture to interface with virtual */ | |
26 | /* ethernet NICs that are presented to the partition by the hypervisor. */ | |
d7fbeba6 | 27 | /* */ |
1da177e4 LT |
28 | /**************************************************************************/ |
29 | /* | |
30 | TODO: | |
1da177e4 LT |
31 | - add support for sysfs |
32 | - possibly remove procfs support | |
33 | */ | |
34 | ||
1da177e4 | 35 | #include <linux/module.h> |
1096d63d | 36 | #include <linux/moduleparam.h> |
1da177e4 LT |
37 | #include <linux/types.h> |
38 | #include <linux/errno.h> | |
39 | #include <linux/ioport.h> | |
40 | #include <linux/dma-mapping.h> | |
41 | #include <linux/kernel.h> | |
42 | #include <linux/netdevice.h> | |
43 | #include <linux/etherdevice.h> | |
44 | #include <linux/skbuff.h> | |
45 | #include <linux/init.h> | |
46 | #include <linux/delay.h> | |
47 | #include <linux/mm.h> | |
e7a3af5d | 48 | #include <linux/pm.h> |
1da177e4 LT |
49 | #include <linux/ethtool.h> |
50 | #include <linux/proc_fs.h> | |
f4ff2872 BK |
51 | #include <linux/in.h> |
52 | #include <linux/ip.h> | |
5a0e3ad6 | 53 | #include <linux/slab.h> |
457c4cbc | 54 | #include <net/net_namespace.h> |
1da177e4 LT |
55 | #include <asm/hvcall.h> |
56 | #include <asm/atomic.h> | |
1da177e4 | 57 | #include <asm/vio.h> |
1096d63d | 58 | #include <asm/iommu.h> |
1da177e4 | 59 | #include <asm/uaccess.h> |
1096d63d | 60 | #include <asm/firmware.h> |
1da177e4 LT |
61 | #include <linux/seq_file.h> |
62 | ||
63 | #include "ibmveth.h" | |
64 | ||
6af37fa9 | 65 | #undef DEBUG |
1da177e4 LT |
66 | |
67 | #define ibmveth_printk(fmt, args...) \ | |
f98baffb | 68 | printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args) |
1da177e4 LT |
69 | |
70 | #define ibmveth_error_printk(fmt, args...) \ | |
71 | printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
72 | ||
73 | #ifdef DEBUG | |
74 | #define ibmveth_debug_printk_no_adapter(fmt, args...) \ | |
75 | printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args) | |
76 | #define ibmveth_debug_printk(fmt, args...) \ | |
77 | printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args) | |
78 | #define ibmveth_assert(expr) \ | |
79 | if(!(expr)) { \ | |
80 | printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \ | |
81 | BUG(); \ | |
82 | } | |
83 | #else | |
84 | #define ibmveth_debug_printk_no_adapter(fmt, args...) | |
85 | #define ibmveth_debug_printk(fmt, args...) | |
d7fbeba6 | 86 | #define ibmveth_assert(expr) |
1da177e4 LT |
87 | #endif |
88 | ||
89 | static int ibmveth_open(struct net_device *dev); | |
90 | static int ibmveth_close(struct net_device *dev); | |
91 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd); | |
bea3348e | 92 | static int ibmveth_poll(struct napi_struct *napi, int budget); |
1da177e4 | 93 | static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev); |
1da177e4 LT |
94 | static void ibmveth_set_multicast_list(struct net_device *dev); |
95 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu); | |
96 | static void ibmveth_proc_register_driver(void); | |
97 | static void ibmveth_proc_unregister_driver(void); | |
98 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter); | |
99 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter); | |
7d12e780 | 100 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); |
493a684a | 101 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); |
1096d63d | 102 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); |
860f242e | 103 | static struct kobj_type ktype_veth_pool; |
1da177e4 | 104 | |
1096d63d | 105 | |
1da177e4 | 106 | #ifdef CONFIG_PROC_FS |
457c4cbc | 107 | #define IBMVETH_PROC_DIR "ibmveth" |
1da177e4 LT |
108 | static struct proc_dir_entry *ibmveth_proc_dir; |
109 | #endif | |
110 | ||
111 | static const char ibmveth_driver_name[] = "ibmveth"; | |
112 | static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver"; | |
113 | #define ibmveth_driver_version "1.03" | |
114 | ||
115 | MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>"); | |
116 | MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver"); | |
117 | MODULE_LICENSE("GPL"); | |
118 | MODULE_VERSION(ibmveth_driver_version); | |
119 | ||
c08cc3cc SL |
120 | static unsigned int tx_copybreak __read_mostly = 128; |
121 | module_param(tx_copybreak, uint, 0644); | |
122 | MODULE_PARM_DESC(tx_copybreak, | |
123 | "Maximum size of packet that is copied to a new buffer on transmit"); | |
124 | ||
8d86c61a SL |
125 | static unsigned int rx_copybreak __read_mostly = 128; |
126 | module_param(rx_copybreak, uint, 0644); | |
127 | MODULE_PARM_DESC(rx_copybreak, | |
128 | "Maximum size of packet that is copied to a new buffer on receive"); | |
129 | ||
ddbb4de9 BK |
130 | struct ibmveth_stat { |
131 | char name[ETH_GSTRING_LEN]; | |
132 | int offset; | |
133 | }; | |
134 | ||
135 | #define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) | |
136 | #define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) | |
137 | ||
138 | struct ibmveth_stat ibmveth_stats[] = { | |
139 | { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, | |
140 | { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, | |
141 | { "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) }, | |
142 | { "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) }, | |
143 | { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, | |
144 | { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, | |
ddbb4de9 BK |
145 | { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, |
146 | { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, | |
147 | }; | |
148 | ||
1da177e4 | 149 | /* simple methods of getting data from the current rxq entry */ |
79ef4a4d BK |
150 | static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) |
151 | { | |
152 | return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; | |
153 | } | |
154 | ||
155 | static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) | |
156 | { | |
157 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT; | |
158 | } | |
159 | ||
1da177e4 LT |
160 | static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) |
161 | { | |
79ef4a4d | 162 | return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle); |
1da177e4 LT |
163 | } |
164 | ||
165 | static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) | |
166 | { | |
79ef4a4d | 167 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID); |
1da177e4 LT |
168 | } |
169 | ||
170 | static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) | |
171 | { | |
79ef4a4d | 172 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK); |
1da177e4 LT |
173 | } |
174 | ||
175 | static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) | |
176 | { | |
177 | return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length); | |
178 | } | |
179 | ||
f4ff2872 BK |
180 | static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) |
181 | { | |
79ef4a4d | 182 | return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD); |
f4ff2872 BK |
183 | } |
184 | ||
1da177e4 | 185 | /* setup the initial settings for a buffer pool */ |
860f242e | 186 | static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active) |
1da177e4 LT |
187 | { |
188 | pool->size = pool_size; | |
189 | pool->index = pool_index; | |
190 | pool->buff_size = buff_size; | |
c033a6d1 | 191 | pool->threshold = pool_size * 7 / 8; |
860f242e | 192 | pool->active = pool_active; |
1da177e4 LT |
193 | } |
194 | ||
195 | /* allocate and setup an buffer pool - called during open */ | |
196 | static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) | |
197 | { | |
198 | int i; | |
199 | ||
d7fbeba6 | 200 | pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); |
1da177e4 LT |
201 | |
202 | if(!pool->free_map) { | |
203 | return -1; | |
204 | } | |
205 | ||
d7fbeba6 | 206 | pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); |
1da177e4 LT |
207 | if(!pool->dma_addr) { |
208 | kfree(pool->free_map); | |
209 | pool->free_map = NULL; | |
210 | return -1; | |
211 | } | |
212 | ||
a05abcb5 | 213 | pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); |
1da177e4 LT |
214 | |
215 | if(!pool->skbuff) { | |
216 | kfree(pool->dma_addr); | |
217 | pool->dma_addr = NULL; | |
218 | ||
219 | kfree(pool->free_map); | |
220 | pool->free_map = NULL; | |
221 | return -1; | |
222 | } | |
223 | ||
1da177e4 LT |
224 | memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); |
225 | ||
226 | for(i = 0; i < pool->size; ++i) { | |
227 | pool->free_map[i] = i; | |
228 | } | |
229 | ||
230 | atomic_set(&pool->available, 0); | |
231 | pool->producer_index = 0; | |
232 | pool->consumer_index = 0; | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | /* replenish the buffers for a pool. note that we don't need to | |
238 | * skb_reserve these since they are used for incoming... | |
239 | */ | |
240 | static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
241 | { | |
242 | u32 i; | |
243 | u32 count = pool->size - atomic_read(&pool->available); | |
244 | u32 buffers_added = 0; | |
1096d63d RJ |
245 | struct sk_buff *skb; |
246 | unsigned int free_index, index; | |
247 | u64 correlator; | |
248 | unsigned long lpar_rc; | |
249 | dma_addr_t dma_addr; | |
1da177e4 LT |
250 | |
251 | mb(); | |
252 | ||
253 | for(i = 0; i < count; ++i) { | |
1da177e4 | 254 | union ibmveth_buf_desc desc; |
1da177e4 LT |
255 | |
256 | skb = alloc_skb(pool->buff_size, GFP_ATOMIC); | |
257 | ||
258 | if(!skb) { | |
259 | ibmveth_debug_printk("replenish: unable to allocate skb\n"); | |
260 | adapter->replenish_no_mem++; | |
261 | break; | |
262 | } | |
263 | ||
047a66d4 | 264 | free_index = pool->consumer_index; |
a613f581 SL |
265 | pool->consumer_index++; |
266 | if (pool->consumer_index >= pool->size) | |
267 | pool->consumer_index = 0; | |
1da177e4 | 268 | index = pool->free_map[free_index]; |
d7fbeba6 | 269 | |
1da177e4 LT |
270 | ibmveth_assert(index != IBM_VETH_INVALID_MAP); |
271 | ibmveth_assert(pool->skbuff[index] == NULL); | |
272 | ||
273 | dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, | |
274 | pool->buff_size, DMA_FROM_DEVICE); | |
275 | ||
c713e7cb | 276 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
277 | goto failure; |
278 | ||
1da177e4 LT |
279 | pool->free_map[free_index] = IBM_VETH_INVALID_MAP; |
280 | pool->dma_addr[index] = dma_addr; | |
281 | pool->skbuff[index] = skb; | |
282 | ||
283 | correlator = ((u64)pool->index << 32) | index; | |
284 | *(u64*)skb->data = correlator; | |
285 | ||
79ef4a4d | 286 | desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; |
d7fbeba6 | 287 | desc.fields.address = dma_addr; |
1da177e4 LT |
288 | |
289 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 290 | |
1096d63d RJ |
291 | if (lpar_rc != H_SUCCESS) |
292 | goto failure; | |
293 | else { | |
1da177e4 LT |
294 | buffers_added++; |
295 | adapter->replenish_add_buff_success++; | |
296 | } | |
297 | } | |
d7fbeba6 | 298 | |
1096d63d RJ |
299 | mb(); |
300 | atomic_add(buffers_added, &(pool->available)); | |
301 | return; | |
302 | ||
303 | failure: | |
304 | pool->free_map[free_index] = index; | |
305 | pool->skbuff[index] = NULL; | |
306 | if (pool->consumer_index == 0) | |
307 | pool->consumer_index = pool->size - 1; | |
308 | else | |
309 | pool->consumer_index--; | |
c713e7cb | 310 | if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
1096d63d RJ |
311 | dma_unmap_single(&adapter->vdev->dev, |
312 | pool->dma_addr[index], pool->buff_size, | |
313 | DMA_FROM_DEVICE); | |
314 | dev_kfree_skb_any(skb); | |
315 | adapter->replenish_add_buff_failure++; | |
316 | ||
1da177e4 LT |
317 | mb(); |
318 | atomic_add(buffers_added, &(pool->available)); | |
319 | } | |
320 | ||
e2adbcb4 | 321 | /* replenish routine */ |
d7fbeba6 | 322 | static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) |
1da177e4 | 323 | { |
b6d35182 SL |
324 | int i; |
325 | ||
1da177e4 LT |
326 | adapter->replenish_task_cycles++; |
327 | ||
c033a6d1 SL |
328 | for (i = (IbmVethNumBufferPools - 1); i >= 0; i--) { |
329 | struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; | |
330 | ||
331 | if (pool->active && | |
332 | (atomic_read(&pool->available) < pool->threshold)) | |
333 | ibmveth_replenish_buffer_pool(adapter, pool); | |
334 | } | |
1da177e4 LT |
335 | |
336 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); | |
1da177e4 LT |
337 | } |
338 | ||
339 | /* empty and free ana buffer pool - also used to do cleanup in error paths */ | |
340 | static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool) | |
341 | { | |
342 | int i; | |
343 | ||
b4558ea9 JJ |
344 | kfree(pool->free_map); |
345 | pool->free_map = NULL; | |
1da177e4 LT |
346 | |
347 | if(pool->skbuff && pool->dma_addr) { | |
348 | for(i = 0; i < pool->size; ++i) { | |
349 | struct sk_buff *skb = pool->skbuff[i]; | |
350 | if(skb) { | |
351 | dma_unmap_single(&adapter->vdev->dev, | |
352 | pool->dma_addr[i], | |
353 | pool->buff_size, | |
354 | DMA_FROM_DEVICE); | |
355 | dev_kfree_skb_any(skb); | |
356 | pool->skbuff[i] = NULL; | |
357 | } | |
358 | } | |
359 | } | |
360 | ||
361 | if(pool->dma_addr) { | |
362 | kfree(pool->dma_addr); | |
363 | pool->dma_addr = NULL; | |
364 | } | |
365 | ||
366 | if(pool->skbuff) { | |
367 | kfree(pool->skbuff); | |
368 | pool->skbuff = NULL; | |
369 | } | |
370 | } | |
371 | ||
372 | /* remove a buffer from a pool */ | |
373 | static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator) | |
374 | { | |
375 | unsigned int pool = correlator >> 32; | |
376 | unsigned int index = correlator & 0xffffffffUL; | |
377 | unsigned int free_index; | |
378 | struct sk_buff *skb; | |
379 | ||
380 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
381 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
382 | ||
383 | skb = adapter->rx_buff_pool[pool].skbuff[index]; | |
384 | ||
385 | ibmveth_assert(skb != NULL); | |
386 | ||
387 | adapter->rx_buff_pool[pool].skbuff[index] = NULL; | |
388 | ||
389 | dma_unmap_single(&adapter->vdev->dev, | |
390 | adapter->rx_buff_pool[pool].dma_addr[index], | |
391 | adapter->rx_buff_pool[pool].buff_size, | |
392 | DMA_FROM_DEVICE); | |
393 | ||
047a66d4 | 394 | free_index = adapter->rx_buff_pool[pool].producer_index; |
a613f581 SL |
395 | adapter->rx_buff_pool[pool].producer_index++; |
396 | if (adapter->rx_buff_pool[pool].producer_index >= | |
397 | adapter->rx_buff_pool[pool].size) | |
398 | adapter->rx_buff_pool[pool].producer_index = 0; | |
1da177e4 LT |
399 | adapter->rx_buff_pool[pool].free_map[free_index] = index; |
400 | ||
401 | mb(); | |
402 | ||
403 | atomic_dec(&(adapter->rx_buff_pool[pool].available)); | |
404 | } | |
405 | ||
406 | /* get the current buffer on the rx queue */ | |
407 | static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) | |
408 | { | |
409 | u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; | |
410 | unsigned int pool = correlator >> 32; | |
411 | unsigned int index = correlator & 0xffffffffUL; | |
412 | ||
413 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
414 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
415 | ||
416 | return adapter->rx_buff_pool[pool].skbuff[index]; | |
417 | } | |
418 | ||
419 | /* recycle the current buffer on the rx queue */ | |
420 | static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) | |
421 | { | |
422 | u32 q_index = adapter->rx_queue.index; | |
423 | u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; | |
424 | unsigned int pool = correlator >> 32; | |
425 | unsigned int index = correlator & 0xffffffffUL; | |
426 | union ibmveth_buf_desc desc; | |
427 | unsigned long lpar_rc; | |
428 | ||
429 | ibmveth_assert(pool < IbmVethNumBufferPools); | |
430 | ibmveth_assert(index < adapter->rx_buff_pool[pool].size); | |
431 | ||
b6d35182 SL |
432 | if(!adapter->rx_buff_pool[pool].active) { |
433 | ibmveth_rxq_harvest_buffer(adapter); | |
434 | ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); | |
435 | return; | |
436 | } | |
437 | ||
79ef4a4d BK |
438 | desc.fields.flags_len = IBMVETH_BUF_VALID | |
439 | adapter->rx_buff_pool[pool].buff_size; | |
1da177e4 LT |
440 | desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; |
441 | ||
442 | lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); | |
d7fbeba6 | 443 | |
706c8c93 | 444 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
445 | ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc); |
446 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
447 | } | |
448 | ||
449 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
450 | adapter->rx_queue.index = 0; | |
451 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
452 | } | |
453 | } | |
454 | ||
493a684a | 455 | static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter) |
1da177e4 LT |
456 | { |
457 | ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator); | |
458 | ||
459 | if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) { | |
460 | adapter->rx_queue.index = 0; | |
461 | adapter->rx_queue.toggle = !adapter->rx_queue.toggle; | |
462 | } | |
463 | } | |
464 | ||
465 | static void ibmveth_cleanup(struct ibmveth_adapter *adapter) | |
466 | { | |
b6d35182 | 467 | int i; |
8d8bb39b | 468 | struct device *dev = &adapter->vdev->dev; |
b6d35182 | 469 | |
1da177e4 | 470 | if(adapter->buffer_list_addr != NULL) { |
8d8bb39b FT |
471 | if (!dma_mapping_error(dev, adapter->buffer_list_dma)) { |
472 | dma_unmap_single(dev, adapter->buffer_list_dma, 4096, | |
1da177e4 LT |
473 | DMA_BIDIRECTIONAL); |
474 | adapter->buffer_list_dma = DMA_ERROR_CODE; | |
475 | } | |
476 | free_page((unsigned long)adapter->buffer_list_addr); | |
477 | adapter->buffer_list_addr = NULL; | |
d7fbeba6 | 478 | } |
1da177e4 LT |
479 | |
480 | if(adapter->filter_list_addr != NULL) { | |
8d8bb39b FT |
481 | if (!dma_mapping_error(dev, adapter->filter_list_dma)) { |
482 | dma_unmap_single(dev, adapter->filter_list_dma, 4096, | |
1da177e4 LT |
483 | DMA_BIDIRECTIONAL); |
484 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
485 | } | |
486 | free_page((unsigned long)adapter->filter_list_addr); | |
487 | adapter->filter_list_addr = NULL; | |
488 | } | |
489 | ||
490 | if(adapter->rx_queue.queue_addr != NULL) { | |
8d8bb39b FT |
491 | if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) { |
492 | dma_unmap_single(dev, | |
1da177e4 LT |
493 | adapter->rx_queue.queue_dma, |
494 | adapter->rx_queue.queue_len, | |
495 | DMA_BIDIRECTIONAL); | |
496 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
497 | } | |
498 | kfree(adapter->rx_queue.queue_addr); | |
499 | adapter->rx_queue.queue_addr = NULL; | |
500 | } | |
501 | ||
b6d35182 | 502 | for(i = 0; i<IbmVethNumBufferPools; i++) |
860f242e | 503 | if (adapter->rx_buff_pool[i].active) |
d7fbeba6 | 504 | ibmveth_free_buffer_pool(adapter, |
860f242e | 505 | &adapter->rx_buff_pool[i]); |
1096d63d RJ |
506 | |
507 | if (adapter->bounce_buffer != NULL) { | |
c713e7cb | 508 | if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
509 | dma_unmap_single(&adapter->vdev->dev, |
510 | adapter->bounce_buffer_dma, | |
511 | adapter->netdev->mtu + IBMVETH_BUFF_OH, | |
512 | DMA_BIDIRECTIONAL); | |
513 | adapter->bounce_buffer_dma = DMA_ERROR_CODE; | |
514 | } | |
515 | kfree(adapter->bounce_buffer); | |
516 | adapter->bounce_buffer = NULL; | |
517 | } | |
1da177e4 LT |
518 | } |
519 | ||
bbedefcc ME |
520 | static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter, |
521 | union ibmveth_buf_desc rxq_desc, u64 mac_address) | |
522 | { | |
523 | int rc, try_again = 1; | |
524 | ||
525 | /* After a kexec the adapter will still be open, so our attempt to | |
526 | * open it will fail. So if we get a failure we free the adapter and | |
527 | * try again, but only once. */ | |
528 | retry: | |
529 | rc = h_register_logical_lan(adapter->vdev->unit_address, | |
530 | adapter->buffer_list_dma, rxq_desc.desc, | |
531 | adapter->filter_list_dma, mac_address); | |
532 | ||
533 | if (rc != H_SUCCESS && try_again) { | |
534 | do { | |
535 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
536 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); | |
537 | ||
538 | try_again = 0; | |
539 | goto retry; | |
540 | } | |
541 | ||
542 | return rc; | |
543 | } | |
544 | ||
1da177e4 LT |
545 | static int ibmveth_open(struct net_device *netdev) |
546 | { | |
4cf1653a | 547 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 548 | u64 mac_address = 0; |
b6d35182 | 549 | int rxq_entries = 1; |
1da177e4 LT |
550 | unsigned long lpar_rc; |
551 | int rc; | |
552 | union ibmveth_buf_desc rxq_desc; | |
b6d35182 | 553 | int i; |
8d8bb39b | 554 | struct device *dev; |
1da177e4 LT |
555 | |
556 | ibmveth_debug_printk("open starting\n"); | |
557 | ||
bea3348e SH |
558 | napi_enable(&adapter->napi); |
559 | ||
b6d35182 SL |
560 | for(i = 0; i<IbmVethNumBufferPools; i++) |
561 | rxq_entries += adapter->rx_buff_pool[i].size; | |
d7fbeba6 | 562 | |
1da177e4 LT |
563 | adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL); |
564 | adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL); | |
d7fbeba6 | 565 | |
1da177e4 LT |
566 | if(!adapter->buffer_list_addr || !adapter->filter_list_addr) { |
567 | ibmveth_error_printk("unable to allocate filter or buffer list pages\n"); | |
568 | ibmveth_cleanup(adapter); | |
bea3348e | 569 | napi_disable(&adapter->napi); |
1da177e4 LT |
570 | return -ENOMEM; |
571 | } | |
572 | ||
573 | adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries; | |
574 | adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL); | |
575 | ||
576 | if(!adapter->rx_queue.queue_addr) { | |
577 | ibmveth_error_printk("unable to allocate rx queue pages\n"); | |
578 | ibmveth_cleanup(adapter); | |
bea3348e | 579 | napi_disable(&adapter->napi); |
1da177e4 LT |
580 | return -ENOMEM; |
581 | } | |
582 | ||
8d8bb39b FT |
583 | dev = &adapter->vdev->dev; |
584 | ||
585 | adapter->buffer_list_dma = dma_map_single(dev, | |
1da177e4 | 586 | adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 587 | adapter->filter_list_dma = dma_map_single(dev, |
1da177e4 | 588 | adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL); |
8d8bb39b | 589 | adapter->rx_queue.queue_dma = dma_map_single(dev, |
1da177e4 LT |
590 | adapter->rx_queue.queue_addr, |
591 | adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL); | |
592 | ||
8d8bb39b FT |
593 | if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
594 | (dma_mapping_error(dev, adapter->filter_list_dma)) || | |
595 | (dma_mapping_error(dev, adapter->rx_queue.queue_dma))) { | |
1da177e4 LT |
596 | ibmveth_error_printk("unable to map filter or buffer list pages\n"); |
597 | ibmveth_cleanup(adapter); | |
bea3348e | 598 | napi_disable(&adapter->napi); |
1da177e4 LT |
599 | return -ENOMEM; |
600 | } | |
601 | ||
602 | adapter->rx_queue.index = 0; | |
603 | adapter->rx_queue.num_slots = rxq_entries; | |
604 | adapter->rx_queue.toggle = 1; | |
605 | ||
1da177e4 LT |
606 | memcpy(&mac_address, netdev->dev_addr, netdev->addr_len); |
607 | mac_address = mac_address >> 16; | |
608 | ||
79ef4a4d | 609 | rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len; |
1da177e4 LT |
610 | rxq_desc.fields.address = adapter->rx_queue.queue_dma; |
611 | ||
612 | ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr); | |
613 | ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr); | |
614 | ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr); | |
615 | ||
4347ef15 SL |
616 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
617 | ||
bbedefcc | 618 | lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address); |
1da177e4 | 619 | |
706c8c93 | 620 | if(lpar_rc != H_SUCCESS) { |
1da177e4 | 621 | ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc); |
a1c5a893 | 622 | ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n", |
1da177e4 LT |
623 | adapter->buffer_list_dma, |
624 | adapter->filter_list_dma, | |
625 | rxq_desc.desc, | |
626 | mac_address); | |
627 | ibmveth_cleanup(adapter); | |
bea3348e | 628 | napi_disable(&adapter->napi); |
d7fbeba6 | 629 | return -ENONET; |
1da177e4 LT |
630 | } |
631 | ||
860f242e SL |
632 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
633 | if(!adapter->rx_buff_pool[i].active) | |
634 | continue; | |
635 | if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) { | |
636 | ibmveth_error_printk("unable to alloc pool\n"); | |
637 | adapter->rx_buff_pool[i].active = 0; | |
638 | ibmveth_cleanup(adapter); | |
bea3348e | 639 | napi_disable(&adapter->napi); |
860f242e SL |
640 | return -ENOMEM ; |
641 | } | |
642 | } | |
643 | ||
1da177e4 | 644 | ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq); |
a0607fd3 | 645 | if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) { |
1da177e4 LT |
646 | ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc); |
647 | do { | |
648 | rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 649 | } while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY)); |
1da177e4 LT |
650 | |
651 | ibmveth_cleanup(adapter); | |
bea3348e | 652 | napi_disable(&adapter->napi); |
1da177e4 LT |
653 | return rc; |
654 | } | |
655 | ||
1096d63d RJ |
656 | adapter->bounce_buffer = |
657 | kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); | |
658 | if (!adapter->bounce_buffer) { | |
659 | ibmveth_error_printk("unable to allocate bounce buffer\n"); | |
660 | ibmveth_cleanup(adapter); | |
661 | napi_disable(&adapter->napi); | |
662 | return -ENOMEM; | |
663 | } | |
664 | adapter->bounce_buffer_dma = | |
665 | dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer, | |
666 | netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL); | |
8d8bb39b | 667 | if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) { |
1096d63d RJ |
668 | ibmveth_error_printk("unable to map bounce buffer\n"); |
669 | ibmveth_cleanup(adapter); | |
670 | napi_disable(&adapter->napi); | |
671 | return -ENOMEM; | |
672 | } | |
673 | ||
e2adbcb4 | 674 | ibmveth_debug_printk("initial replenish cycle\n"); |
7d12e780 | 675 | ibmveth_interrupt(netdev->irq, netdev); |
1da177e4 | 676 | |
e2adbcb4 | 677 | netif_start_queue(netdev); |
1da177e4 LT |
678 | |
679 | ibmveth_debug_printk("open complete\n"); | |
680 | ||
681 | return 0; | |
682 | } | |
683 | ||
684 | static int ibmveth_close(struct net_device *netdev) | |
685 | { | |
4cf1653a | 686 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 | 687 | long lpar_rc; |
d7fbeba6 | 688 | |
1da177e4 LT |
689 | ibmveth_debug_printk("close starting\n"); |
690 | ||
bea3348e SH |
691 | napi_disable(&adapter->napi); |
692 | ||
860f242e SL |
693 | if (!adapter->pool_config) |
694 | netif_stop_queue(netdev); | |
1da177e4 | 695 | |
ee2e6114 | 696 | h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE); |
1da177e4 | 697 | |
1da177e4 LT |
698 | do { |
699 | lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); | |
706c8c93 | 700 | } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
1da177e4 | 701 | |
706c8c93 | 702 | if(lpar_rc != H_SUCCESS) |
1da177e4 LT |
703 | { |
704 | ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n", | |
705 | lpar_rc); | |
706 | } | |
707 | ||
ee2e6114 RJ |
708 | free_irq(netdev->irq, netdev); |
709 | ||
1da177e4 LT |
710 | adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8); |
711 | ||
712 | ibmveth_cleanup(adapter); | |
713 | ||
714 | ibmveth_debug_printk("close complete\n"); | |
715 | ||
716 | return 0; | |
717 | } | |
718 | ||
719 | static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) { | |
720 | cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE); | |
721 | cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE); | |
722 | cmd->speed = SPEED_1000; | |
723 | cmd->duplex = DUPLEX_FULL; | |
724 | cmd->port = PORT_FIBRE; | |
725 | cmd->phy_address = 0; | |
726 | cmd->transceiver = XCVR_INTERNAL; | |
727 | cmd->autoneg = AUTONEG_ENABLE; | |
728 | cmd->maxtxpkt = 0; | |
729 | cmd->maxrxpkt = 1; | |
730 | return 0; | |
731 | } | |
732 | ||
733 | static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) { | |
734 | strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1); | |
735 | strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1); | |
736 | } | |
737 | ||
738 | static u32 netdev_get_link(struct net_device *dev) { | |
739 | return 1; | |
740 | } | |
741 | ||
5fc7e01c BK |
742 | static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data) |
743 | { | |
4cf1653a | 744 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
745 | |
746 | if (data) | |
747 | adapter->rx_csum = 1; | |
748 | else { | |
749 | /* | |
750 | * Since the ibmveth firmware interface does not have the concept of | |
751 | * separate tx/rx checksum offload enable, if rx checksum is disabled | |
752 | * we also have to disable tx checksum offload. Once we disable rx | |
753 | * checksum offload, we are no longer allowed to send tx buffers that | |
754 | * are not properly checksummed. | |
755 | */ | |
756 | adapter->rx_csum = 0; | |
757 | dev->features &= ~NETIF_F_IP_CSUM; | |
758 | } | |
759 | } | |
760 | ||
761 | static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data) | |
762 | { | |
4cf1653a | 763 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
764 | |
765 | if (data) { | |
766 | dev->features |= NETIF_F_IP_CSUM; | |
767 | adapter->rx_csum = 1; | |
768 | } else | |
769 | dev->features &= ~NETIF_F_IP_CSUM; | |
770 | } | |
771 | ||
772 | static int ibmveth_set_csum_offload(struct net_device *dev, u32 data, | |
773 | void (*done) (struct net_device *, u32)) | |
774 | { | |
4cf1653a | 775 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ff5bfc35 | 776 | unsigned long set_attr, clr_attr, ret_attr; |
5fc7e01c BK |
777 | long ret; |
778 | int rc1 = 0, rc2 = 0; | |
779 | int restart = 0; | |
780 | ||
781 | if (netif_running(dev)) { | |
782 | restart = 1; | |
783 | adapter->pool_config = 1; | |
784 | ibmveth_close(dev); | |
785 | adapter->pool_config = 0; | |
786 | } | |
787 | ||
79ef4a4d BK |
788 | set_attr = 0; |
789 | clr_attr = 0; | |
5fc7e01c BK |
790 | |
791 | if (data) | |
79ef4a4d | 792 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
5fc7e01c | 793 | else |
79ef4a4d | 794 | clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; |
5fc7e01c | 795 | |
79ef4a4d | 796 | ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr); |
5fc7e01c | 797 | |
79ef4a4d BK |
798 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
799 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
800 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
801 | ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr, | |
802 | set_attr, &ret_attr); | |
5fc7e01c BK |
803 | |
804 | if (ret != H_SUCCESS) { | |
805 | rc1 = -EIO; | |
806 | ibmveth_error_printk("unable to change checksum offload settings." | |
807 | " %d rc=%ld\n", data, ret); | |
808 | ||
809 | ret = h_illan_attributes(adapter->vdev->unit_address, | |
79ef4a4d | 810 | set_attr, clr_attr, &ret_attr); |
5fc7e01c BK |
811 | } else |
812 | done(dev, data); | |
813 | } else { | |
814 | rc1 = -EIO; | |
815 | ibmveth_error_printk("unable to change checksum offload settings." | |
79ef4a4d | 816 | " %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr); |
5fc7e01c BK |
817 | } |
818 | ||
819 | if (restart) | |
820 | rc2 = ibmveth_open(dev); | |
821 | ||
822 | return rc1 ? rc1 : rc2; | |
823 | } | |
824 | ||
825 | static int ibmveth_set_rx_csum(struct net_device *dev, u32 data) | |
826 | { | |
4cf1653a | 827 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
828 | |
829 | if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum)) | |
830 | return 0; | |
831 | ||
832 | return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags); | |
833 | } | |
834 | ||
835 | static int ibmveth_set_tx_csum(struct net_device *dev, u32 data) | |
836 | { | |
4cf1653a | 837 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
838 | int rc = 0; |
839 | ||
840 | if (data && (dev->features & NETIF_F_IP_CSUM)) | |
841 | return 0; | |
842 | if (!data && !(dev->features & NETIF_F_IP_CSUM)) | |
843 | return 0; | |
844 | ||
845 | if (data && !adapter->rx_csum) | |
846 | rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags); | |
847 | else | |
848 | ibmveth_set_tx_csum_flags(dev, data); | |
849 | ||
850 | return rc; | |
851 | } | |
852 | ||
853 | static u32 ibmveth_get_rx_csum(struct net_device *dev) | |
854 | { | |
4cf1653a | 855 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
5fc7e01c BK |
856 | return adapter->rx_csum; |
857 | } | |
858 | ||
ddbb4de9 BK |
859 | static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data) |
860 | { | |
861 | int i; | |
862 | ||
863 | if (stringset != ETH_SS_STATS) | |
864 | return; | |
865 | ||
866 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN) | |
867 | memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN); | |
868 | } | |
869 | ||
b9f2c044 | 870 | static int ibmveth_get_sset_count(struct net_device *dev, int sset) |
ddbb4de9 | 871 | { |
b9f2c044 JG |
872 | switch (sset) { |
873 | case ETH_SS_STATS: | |
874 | return ARRAY_SIZE(ibmveth_stats); | |
875 | default: | |
876 | return -EOPNOTSUPP; | |
877 | } | |
ddbb4de9 BK |
878 | } |
879 | ||
880 | static void ibmveth_get_ethtool_stats(struct net_device *dev, | |
881 | struct ethtool_stats *stats, u64 *data) | |
882 | { | |
883 | int i; | |
4cf1653a | 884 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
ddbb4de9 BK |
885 | |
886 | for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++) | |
887 | data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset); | |
888 | } | |
889 | ||
7282d491 | 890 | static const struct ethtool_ops netdev_ethtool_ops = { |
1da177e4 LT |
891 | .get_drvinfo = netdev_get_drvinfo, |
892 | .get_settings = netdev_get_settings, | |
893 | .get_link = netdev_get_link, | |
5fc7e01c BK |
894 | .set_tx_csum = ibmveth_set_tx_csum, |
895 | .get_rx_csum = ibmveth_get_rx_csum, | |
896 | .set_rx_csum = ibmveth_set_rx_csum, | |
ddbb4de9 | 897 | .get_strings = ibmveth_get_strings, |
b9f2c044 | 898 | .get_sset_count = ibmveth_get_sset_count, |
ddbb4de9 | 899 | .get_ethtool_stats = ibmveth_get_ethtool_stats, |
6e8ab30e | 900 | .set_sg = ethtool_op_set_sg, |
1da177e4 LT |
901 | }; |
902 | ||
903 | static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) | |
904 | { | |
905 | return -EOPNOTSUPP; | |
906 | } | |
907 | ||
908 | #define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1)) | |
909 | ||
6e8ab30e SL |
910 | static int ibmveth_send(struct ibmveth_adapter *adapter, |
911 | union ibmveth_buf_desc *descs) | |
1da177e4 | 912 | { |
1da177e4 LT |
913 | unsigned long correlator; |
914 | unsigned int retry_count; | |
6e8ab30e SL |
915 | unsigned long ret; |
916 | ||
917 | /* | |
918 | * The retry count sets a maximum for the number of broadcast and | |
919 | * multicast destinations within the system. | |
920 | */ | |
921 | retry_count = 1024; | |
922 | correlator = 0; | |
923 | do { | |
924 | ret = h_send_logical_lan(adapter->vdev->unit_address, | |
925 | descs[0].desc, descs[1].desc, | |
926 | descs[2].desc, descs[3].desc, | |
927 | descs[4].desc, descs[5].desc, | |
928 | correlator, &correlator); | |
929 | } while ((ret == H_BUSY) && (retry_count--)); | |
930 | ||
931 | if (ret != H_SUCCESS && ret != H_DROPPED) { | |
932 | ibmveth_error_printk("tx: h_send_logical_lan failed with " | |
933 | "rc=%ld\n", ret); | |
934 | return 1; | |
935 | } | |
936 | ||
937 | return 0; | |
938 | } | |
60296d9e | 939 | |
6e8ab30e SL |
940 | static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb, |
941 | struct net_device *netdev) | |
942 | { | |
943 | struct ibmveth_adapter *adapter = netdev_priv(netdev); | |
944 | unsigned int desc_flags; | |
945 | union ibmveth_buf_desc descs[6]; | |
946 | int last, i; | |
947 | int force_bounce = 0; | |
948 | ||
949 | /* | |
950 | * veth handles a maximum of 6 segments including the header, so | |
951 | * we have to linearize the skb if there are more than this. | |
952 | */ | |
953 | if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) { | |
954 | netdev->stats.tx_dropped++; | |
955 | goto out; | |
956 | } | |
1da177e4 | 957 | |
6e8ab30e | 958 | /* veth can't checksum offload UDP */ |
f4ff2872 BK |
959 | if (skb->ip_summed == CHECKSUM_PARTIAL && |
960 | ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) { | |
961 | ibmveth_error_printk("tx: failed to checksum packet\n"); | |
6e8ab30e | 962 | netdev->stats.tx_dropped++; |
f4ff2872 BK |
963 | goto out; |
964 | } | |
965 | ||
6e8ab30e SL |
966 | desc_flags = IBMVETH_BUF_VALID; |
967 | ||
f4ff2872 | 968 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
6e8ab30e SL |
969 | unsigned char *buf = skb_transport_header(skb) + |
970 | skb->csum_offset; | |
f4ff2872 | 971 | |
6e8ab30e | 972 | desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD); |
f4ff2872 BK |
973 | |
974 | /* Need to zero out the checksum */ | |
975 | buf[0] = 0; | |
976 | buf[1] = 0; | |
977 | } | |
978 | ||
6e8ab30e SL |
979 | retry_bounce: |
980 | memset(descs, 0, sizeof(descs)); | |
c08cc3cc | 981 | |
6e8ab30e SL |
982 | /* |
983 | * If a linear packet is below the rx threshold then | |
984 | * copy it into the static bounce buffer. This avoids the | |
985 | * cost of a TCE insert and remove. | |
986 | */ | |
987 | if (force_bounce || (!skb_is_nonlinear(skb) && | |
988 | (skb->len < tx_copybreak))) { | |
1096d63d RJ |
989 | skb_copy_from_linear_data(skb, adapter->bounce_buffer, |
990 | skb->len); | |
1da177e4 | 991 | |
6e8ab30e SL |
992 | descs[0].fields.flags_len = desc_flags | skb->len; |
993 | descs[0].fields.address = adapter->bounce_buffer_dma; | |
994 | ||
995 | if (ibmveth_send(adapter, descs)) { | |
996 | adapter->tx_send_failed++; | |
997 | netdev->stats.tx_dropped++; | |
998 | } else { | |
999 | netdev->stats.tx_packets++; | |
1000 | netdev->stats.tx_bytes += skb->len; | |
1001 | } | |
1002 | ||
1003 | goto out; | |
1004 | } | |
1005 | ||
1006 | /* Map the header */ | |
1007 | descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data, | |
1008 | skb_headlen(skb), | |
1009 | DMA_TO_DEVICE); | |
1010 | if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address)) | |
1011 | goto map_failed; | |
1012 | ||
1013 | descs[0].fields.flags_len = desc_flags | skb_headlen(skb); | |
1014 | ||
1015 | /* Map the frags */ | |
1016 | for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { | |
1017 | unsigned long dma_addr; | |
1018 | skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; | |
1019 | ||
1020 | dma_addr = dma_map_page(&adapter->vdev->dev, frag->page, | |
1021 | frag->page_offset, frag->size, | |
1022 | DMA_TO_DEVICE); | |
1023 | ||
1024 | if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) | |
1025 | goto map_failed_frags; | |
1026 | ||
1027 | descs[i+1].fields.flags_len = desc_flags | frag->size; | |
1028 | descs[i+1].fields.address = dma_addr; | |
1029 | } | |
1030 | ||
1031 | if (ibmveth_send(adapter, descs)) { | |
1032 | adapter->tx_send_failed++; | |
1033 | netdev->stats.tx_dropped++; | |
1da177e4 | 1034 | } else { |
6e8ab30e SL |
1035 | netdev->stats.tx_packets++; |
1036 | netdev->stats.tx_bytes += skb->len; | |
1da177e4 LT |
1037 | } |
1038 | ||
6e8ab30e SL |
1039 | for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++) |
1040 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1041 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1042 | DMA_TO_DEVICE); | |
1da177e4 | 1043 | |
e8cb7eb4 | 1044 | out: |
1da177e4 | 1045 | dev_kfree_skb(skb); |
6ed10654 | 1046 | return NETDEV_TX_OK; |
6e8ab30e SL |
1047 | |
1048 | map_failed_frags: | |
1049 | last = i+1; | |
1050 | for (i = 0; i < last; i++) | |
1051 | dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address, | |
1052 | descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK, | |
1053 | DMA_TO_DEVICE); | |
1054 | ||
1055 | map_failed: | |
1056 | if (!firmware_has_feature(FW_FEATURE_CMO)) | |
1057 | ibmveth_error_printk("tx: unable to map xmit buffer\n"); | |
1058 | adapter->tx_map_failed++; | |
1059 | skb_linearize(skb); | |
1060 | force_bounce = 1; | |
1061 | goto retry_bounce; | |
1da177e4 LT |
1062 | } |
1063 | ||
bea3348e | 1064 | static int ibmveth_poll(struct napi_struct *napi, int budget) |
1da177e4 | 1065 | { |
bea3348e SH |
1066 | struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi); |
1067 | struct net_device *netdev = adapter->netdev; | |
1da177e4 | 1068 | int frames_processed = 0; |
1da177e4 LT |
1069 | unsigned long lpar_rc; |
1070 | ||
1071 | restart_poll: | |
1072 | do { | |
bea3348e SH |
1073 | if (!ibmveth_rxq_pending_buffer(adapter)) |
1074 | break; | |
1da177e4 | 1075 | |
f89e49e7 | 1076 | smp_rmb(); |
bea3348e SH |
1077 | if (!ibmveth_rxq_buffer_valid(adapter)) { |
1078 | wmb(); /* suggested by larson1 */ | |
1079 | adapter->rx_invalid_buffer++; | |
1080 | ibmveth_debug_printk("recycling invalid buffer\n"); | |
1081 | ibmveth_rxq_recycle_buffer(adapter); | |
1082 | } else { | |
8d86c61a | 1083 | struct sk_buff *skb, *new_skb; |
bea3348e SH |
1084 | int length = ibmveth_rxq_frame_length(adapter); |
1085 | int offset = ibmveth_rxq_frame_offset(adapter); | |
f4ff2872 BK |
1086 | int csum_good = ibmveth_rxq_csum_good(adapter); |
1087 | ||
bea3348e | 1088 | skb = ibmveth_rxq_get_buffer(adapter); |
1da177e4 | 1089 | |
8d86c61a SL |
1090 | new_skb = NULL; |
1091 | if (length < rx_copybreak) | |
1092 | new_skb = netdev_alloc_skb(netdev, length); | |
1093 | ||
1094 | if (new_skb) { | |
1095 | skb_copy_to_linear_data(new_skb, | |
1096 | skb->data + offset, | |
1097 | length); | |
1098 | skb = new_skb; | |
1099 | ibmveth_rxq_recycle_buffer(adapter); | |
1100 | } else { | |
1101 | ibmveth_rxq_harvest_buffer(adapter); | |
1102 | skb_reserve(skb, offset); | |
1103 | } | |
1da177e4 | 1104 | |
bea3348e SH |
1105 | skb_put(skb, length); |
1106 | skb->protocol = eth_type_trans(skb, netdev); | |
1da177e4 | 1107 | |
8d86c61a SL |
1108 | if (csum_good) |
1109 | skb->ip_summed = CHECKSUM_UNNECESSARY; | |
1110 | ||
bea3348e | 1111 | netif_receive_skb(skb); /* send it up */ |
1da177e4 | 1112 | |
09f75cd7 JG |
1113 | netdev->stats.rx_packets++; |
1114 | netdev->stats.rx_bytes += length; | |
bea3348e | 1115 | frames_processed++; |
1da177e4 | 1116 | } |
bea3348e | 1117 | } while (frames_processed < budget); |
1da177e4 | 1118 | |
e2adbcb4 | 1119 | ibmveth_replenish_task(adapter); |
1da177e4 | 1120 | |
bea3348e SH |
1121 | if (frames_processed < budget) { |
1122 | /* We think we are done - reenable interrupts, | |
1123 | * then check once more to make sure we are done. | |
1124 | */ | |
1125 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, | |
1126 | VIO_IRQ_ENABLE); | |
1da177e4 | 1127 | |
bea3348e | 1128 | ibmveth_assert(lpar_rc == H_SUCCESS); |
1da177e4 | 1129 | |
288379f0 | 1130 | napi_complete(napi); |
1da177e4 | 1131 | |
bea3348e | 1132 | if (ibmveth_rxq_pending_buffer(adapter) && |
288379f0 | 1133 | napi_reschedule(napi)) { |
bea3348e SH |
1134 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1135 | VIO_IRQ_DISABLE); | |
1136 | goto restart_poll; | |
1137 | } | |
1da177e4 LT |
1138 | } |
1139 | ||
bea3348e | 1140 | return frames_processed; |
1da177e4 LT |
1141 | } |
1142 | ||
7d12e780 | 1143 | static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance) |
d7fbeba6 | 1144 | { |
1da177e4 | 1145 | struct net_device *netdev = dev_instance; |
4cf1653a | 1146 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1147 | unsigned long lpar_rc; |
1148 | ||
288379f0 | 1149 | if (napi_schedule_prep(&adapter->napi)) { |
bea3348e SH |
1150 | lpar_rc = h_vio_signal(adapter->vdev->unit_address, |
1151 | VIO_IRQ_DISABLE); | |
706c8c93 | 1152 | ibmveth_assert(lpar_rc == H_SUCCESS); |
288379f0 | 1153 | __napi_schedule(&adapter->napi); |
1da177e4 LT |
1154 | } |
1155 | return IRQ_HANDLED; | |
1156 | } | |
1157 | ||
1da177e4 LT |
1158 | static void ibmveth_set_multicast_list(struct net_device *netdev) |
1159 | { | |
4cf1653a | 1160 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
1da177e4 LT |
1161 | unsigned long lpar_rc; |
1162 | ||
4cd24eaf JP |
1163 | if ((netdev->flags & IFF_PROMISC) || |
1164 | (netdev_mc_count(netdev) > adapter->mcastFilterSize)) { | |
1da177e4 LT |
1165 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1166 | IbmVethMcastEnableRecv | | |
1167 | IbmVethMcastDisableFiltering, | |
1168 | 0); | |
706c8c93 | 1169 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1170 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc); |
1171 | } | |
1172 | } else { | |
22bedad3 | 1173 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1174 | /* clear the filter table & disable filtering */ |
1175 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1176 | IbmVethMcastEnableRecv | | |
1177 | IbmVethMcastDisableFiltering | | |
1178 | IbmVethMcastClearFilterTable, | |
1179 | 0); | |
706c8c93 | 1180 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1181 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc); |
1182 | } | |
1183 | /* add the addresses to the filter table */ | |
22bedad3 | 1184 | netdev_for_each_mc_addr(ha, netdev) { |
1da177e4 LT |
1185 | // add the multicast address to the filter table |
1186 | unsigned long mcast_addr = 0; | |
22bedad3 | 1187 | memcpy(((char *)&mcast_addr)+2, ha->addr, 6); |
1da177e4 LT |
1188 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, |
1189 | IbmVethMcastAddFilter, | |
1190 | mcast_addr); | |
706c8c93 | 1191 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1192 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc); |
1193 | } | |
1194 | } | |
d7fbeba6 | 1195 | |
1da177e4 LT |
1196 | /* re-enable filtering */ |
1197 | lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address, | |
1198 | IbmVethMcastEnableFiltering, | |
1199 | 0); | |
706c8c93 | 1200 | if(lpar_rc != H_SUCCESS) { |
1da177e4 LT |
1201 | ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc); |
1202 | } | |
1203 | } | |
1204 | } | |
1205 | ||
1206 | static int ibmveth_change_mtu(struct net_device *dev, int new_mtu) | |
1207 | { | |
4cf1653a | 1208 | struct ibmveth_adapter *adapter = netdev_priv(dev); |
1096d63d | 1209 | struct vio_dev *viodev = adapter->vdev; |
860f242e | 1210 | int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH; |
0645bab7 RJ |
1211 | int i, rc; |
1212 | int need_restart = 0; | |
b6d35182 | 1213 | |
860f242e | 1214 | if (new_mtu < IBMVETH_MAX_MTU) |
1da177e4 | 1215 | return -EINVAL; |
b6d35182 | 1216 | |
ce6eea58 BK |
1217 | for (i = 0; i < IbmVethNumBufferPools; i++) |
1218 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) | |
1219 | break; | |
1220 | ||
1221 | if (i == IbmVethNumBufferPools) | |
1222 | return -EINVAL; | |
1223 | ||
ea866e65 SL |
1224 | /* Deactivate all the buffer pools so that the next loop can activate |
1225 | only the buffer pools necessary to hold the new MTU */ | |
0645bab7 RJ |
1226 | if (netif_running(adapter->netdev)) { |
1227 | need_restart = 1; | |
1228 | adapter->pool_config = 1; | |
1229 | ibmveth_close(adapter->netdev); | |
1230 | adapter->pool_config = 0; | |
1231 | } | |
ea866e65 | 1232 | |
860f242e | 1233 | /* Look for an active buffer pool that can hold the new MTU */ |
b6d35182 | 1234 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
ea866e65 | 1235 | adapter->rx_buff_pool[i].active = 1; |
ce6eea58 | 1236 | |
860f242e | 1237 | if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) { |
1096d63d RJ |
1238 | dev->mtu = new_mtu; |
1239 | vio_cmo_set_dev_desired(viodev, | |
1240 | ibmveth_get_desired_dma | |
1241 | (viodev)); | |
0645bab7 RJ |
1242 | if (need_restart) { |
1243 | return ibmveth_open(adapter->netdev); | |
1244 | } | |
860f242e | 1245 | return 0; |
b6d35182 | 1246 | } |
b6d35182 | 1247 | } |
0645bab7 RJ |
1248 | |
1249 | if (need_restart && (rc = ibmveth_open(adapter->netdev))) | |
1250 | return rc; | |
1251 | ||
860f242e | 1252 | return -EINVAL; |
1da177e4 LT |
1253 | } |
1254 | ||
6b422374 SL |
1255 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1256 | static void ibmveth_poll_controller(struct net_device *dev) | |
1257 | { | |
4cf1653a | 1258 | ibmveth_replenish_task(netdev_priv(dev)); |
5f77113c | 1259 | ibmveth_interrupt(dev->irq, dev); |
6b422374 SL |
1260 | } |
1261 | #endif | |
1262 | ||
1096d63d RJ |
1263 | /** |
1264 | * ibmveth_get_desired_dma - Calculate IO memory desired by the driver | |
1265 | * | |
1266 | * @vdev: struct vio_dev for the device whose desired IO mem is to be returned | |
1267 | * | |
1268 | * Return value: | |
1269 | * Number of bytes of IO data the driver will need to perform well. | |
1270 | */ | |
1271 | static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev) | |
1272 | { | |
1273 | struct net_device *netdev = dev_get_drvdata(&vdev->dev); | |
1274 | struct ibmveth_adapter *adapter; | |
1275 | unsigned long ret; | |
1276 | int i; | |
1277 | int rxqentries = 1; | |
1278 | ||
1279 | /* netdev inits at probe time along with the structures we need below*/ | |
1280 | if (netdev == NULL) | |
1281 | return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT); | |
1282 | ||
1283 | adapter = netdev_priv(netdev); | |
1284 | ||
1285 | ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; | |
1286 | ret += IOMMU_PAGE_ALIGN(netdev->mtu); | |
1287 | ||
1288 | for (i = 0; i < IbmVethNumBufferPools; i++) { | |
1289 | /* add the size of the active receive buffers */ | |
1290 | if (adapter->rx_buff_pool[i].active) | |
1291 | ret += | |
1292 | adapter->rx_buff_pool[i].size * | |
1293 | IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i]. | |
1294 | buff_size); | |
1295 | rxqentries += adapter->rx_buff_pool[i].size; | |
1296 | } | |
1297 | /* add the size of the receive queue entries */ | |
1298 | ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry)); | |
1299 | ||
1300 | return ret; | |
1301 | } | |
1302 | ||
e186d174 AB |
1303 | static const struct net_device_ops ibmveth_netdev_ops = { |
1304 | .ndo_open = ibmveth_open, | |
1305 | .ndo_stop = ibmveth_close, | |
1306 | .ndo_start_xmit = ibmveth_start_xmit, | |
1307 | .ndo_set_multicast_list = ibmveth_set_multicast_list, | |
1308 | .ndo_do_ioctl = ibmveth_ioctl, | |
1309 | .ndo_change_mtu = ibmveth_change_mtu, | |
1310 | .ndo_validate_addr = eth_validate_addr, | |
1311 | .ndo_set_mac_address = eth_mac_addr, | |
1312 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
1313 | .ndo_poll_controller = ibmveth_poll_controller, | |
1314 | #endif | |
1315 | }; | |
1316 | ||
1da177e4 LT |
1317 | static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
1318 | { | |
b6d35182 | 1319 | int rc, i; |
f4ff2872 | 1320 | long ret; |
1da177e4 | 1321 | struct net_device *netdev; |
9dc83afd | 1322 | struct ibmveth_adapter *adapter; |
ff5bfc35 | 1323 | unsigned long set_attr, ret_attr; |
1da177e4 LT |
1324 | |
1325 | unsigned char *mac_addr_p; | |
1326 | unsigned int *mcastFilterSize_p; | |
1327 | ||
1328 | ||
d7fbeba6 | 1329 | ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n", |
1da177e4 LT |
1330 | dev->unit_address); |
1331 | ||
493a684a ME |
1332 | mac_addr_p = (unsigned char *) vio_get_attribute(dev, |
1333 | VETH_MAC_ADDR, NULL); | |
1da177e4 LT |
1334 | if(!mac_addr_p) { |
1335 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR " | |
1336 | "attribute\n", __FILE__, __LINE__); | |
1337 | return 0; | |
1338 | } | |
d7fbeba6 | 1339 | |
493a684a ME |
1340 | mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev, |
1341 | VETH_MCAST_FILTER_SIZE, NULL); | |
1da177e4 LT |
1342 | if(!mcastFilterSize_p) { |
1343 | printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find " | |
1344 | "VETH_MCAST_FILTER_SIZE attribute\n", | |
1345 | __FILE__, __LINE__); | |
1346 | return 0; | |
1347 | } | |
d7fbeba6 | 1348 | |
1da177e4 LT |
1349 | netdev = alloc_etherdev(sizeof(struct ibmveth_adapter)); |
1350 | ||
1351 | if(!netdev) | |
1352 | return -ENOMEM; | |
1353 | ||
4cf1653a | 1354 | adapter = netdev_priv(netdev); |
c7ae011d | 1355 | dev_set_drvdata(&dev->dev, netdev); |
1da177e4 LT |
1356 | |
1357 | adapter->vdev = dev; | |
1358 | adapter->netdev = netdev; | |
1359 | adapter->mcastFilterSize= *mcastFilterSize_p; | |
860f242e | 1360 | adapter->pool_config = 0; |
d7fbeba6 | 1361 | |
bea3348e SH |
1362 | netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16); |
1363 | ||
1da177e4 | 1364 | /* Some older boxes running PHYP non-natively have an OF that |
d7fbeba6 | 1365 | returns a 8-byte local-mac-address field (and the first |
1da177e4 | 1366 | 2 bytes have to be ignored) while newer boxes' OF return |
d7fbeba6 | 1367 | a 6-byte field. Note that IEEE 1275 specifies that |
1da177e4 | 1368 | local-mac-address must be a 6-byte field. |
d7fbeba6 | 1369 | The RPA doc specifies that the first byte must be 10b, so |
1da177e4 LT |
1370 | we'll just look for it to solve this 8 vs. 6 byte field issue */ |
1371 | ||
1372 | if ((*mac_addr_p & 0x3) != 0x02) | |
1373 | mac_addr_p += 2; | |
1374 | ||
1375 | adapter->mac_addr = 0; | |
1376 | memcpy(&adapter->mac_addr, mac_addr_p, 6); | |
1377 | ||
1da177e4 | 1378 | netdev->irq = dev->irq; |
e186d174 AB |
1379 | netdev->netdev_ops = &ibmveth_netdev_ops; |
1380 | netdev->ethtool_ops = &netdev_ethtool_ops; | |
1da177e4 | 1381 | SET_NETDEV_DEV(netdev, &dev->dev); |
6e8ab30e | 1382 | netdev->features |= NETIF_F_SG; |
1da177e4 | 1383 | |
d44b5e07 | 1384 | memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len); |
1da177e4 | 1385 | |
860f242e SL |
1386 | for(i = 0; i<IbmVethNumBufferPools; i++) { |
1387 | struct kobject *kobj = &adapter->rx_buff_pool[i].kobj; | |
8dde2a96 GKH |
1388 | int error; |
1389 | ||
d7fbeba6 JG |
1390 | ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i, |
1391 | pool_count[i], pool_size[i], | |
860f242e | 1392 | pool_active[i]); |
8dde2a96 GKH |
1393 | error = kobject_init_and_add(kobj, &ktype_veth_pool, |
1394 | &dev->dev.kobj, "pool%d", i); | |
1395 | if (!error) | |
1396 | kobject_uevent(kobj, KOBJ_ADD); | |
860f242e | 1397 | } |
1da177e4 LT |
1398 | |
1399 | ibmveth_debug_printk("adapter @ 0x%p\n", adapter); | |
1400 | ||
1da177e4 LT |
1401 | adapter->buffer_list_dma = DMA_ERROR_CODE; |
1402 | adapter->filter_list_dma = DMA_ERROR_CODE; | |
1403 | adapter->rx_queue.queue_dma = DMA_ERROR_CODE; | |
1404 | ||
1da177e4 LT |
1405 | ibmveth_debug_printk("registering netdev...\n"); |
1406 | ||
79ef4a4d | 1407 | ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr); |
f4ff2872 | 1408 | |
79ef4a4d BK |
1409 | if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) && |
1410 | !(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) && | |
1411 | (ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) { | |
1412 | set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM; | |
f4ff2872 | 1413 | |
79ef4a4d | 1414 | ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr); |
f4ff2872 | 1415 | |
5fc7e01c BK |
1416 | if (ret == H_SUCCESS) { |
1417 | adapter->rx_csum = 1; | |
f4ff2872 | 1418 | netdev->features |= NETIF_F_IP_CSUM; |
5fc7e01c | 1419 | } else |
79ef4a4d | 1420 | ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr); |
f4ff2872 BK |
1421 | } |
1422 | ||
1da177e4 LT |
1423 | rc = register_netdev(netdev); |
1424 | ||
1425 | if(rc) { | |
1426 | ibmveth_debug_printk("failed to register netdev rc=%d\n", rc); | |
1427 | free_netdev(netdev); | |
1428 | return rc; | |
1429 | } | |
1430 | ||
1431 | ibmveth_debug_printk("registered\n"); | |
1432 | ||
1433 | ibmveth_proc_register_adapter(adapter); | |
1434 | ||
1435 | return 0; | |
1436 | } | |
1437 | ||
1438 | static int __devexit ibmveth_remove(struct vio_dev *dev) | |
1439 | { | |
c7ae011d | 1440 | struct net_device *netdev = dev_get_drvdata(&dev->dev); |
4cf1653a | 1441 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1442 | int i; |
1443 | ||
1444 | for(i = 0; i<IbmVethNumBufferPools; i++) | |
c10997f6 | 1445 | kobject_put(&adapter->rx_buff_pool[i].kobj); |
1da177e4 LT |
1446 | |
1447 | unregister_netdev(netdev); | |
1448 | ||
1449 | ibmveth_proc_unregister_adapter(adapter); | |
1450 | ||
1451 | free_netdev(netdev); | |
1096d63d RJ |
1452 | dev_set_drvdata(&dev->dev, NULL); |
1453 | ||
1da177e4 LT |
1454 | return 0; |
1455 | } | |
1456 | ||
1457 | #ifdef CONFIG_PROC_FS | |
1458 | static void ibmveth_proc_register_driver(void) | |
1459 | { | |
457c4cbc | 1460 | ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 | 1461 | if (ibmveth_proc_dir) { |
1da177e4 LT |
1462 | } |
1463 | } | |
1464 | ||
1465 | static void ibmveth_proc_unregister_driver(void) | |
1466 | { | |
457c4cbc | 1467 | remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net); |
1da177e4 LT |
1468 | } |
1469 | ||
1119d577 | 1470 | static int ibmveth_show(struct seq_file *seq, void *v) |
1da177e4 LT |
1471 | { |
1472 | struct ibmveth_adapter *adapter = seq->private; | |
3a6d54c5 JP |
1473 | char *current_mac = (char *) adapter->netdev->dev_addr; |
1474 | char *firmware_mac = (char *) &adapter->mac_addr; | |
1da177e4 LT |
1475 | |
1476 | seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version); | |
d7fbeba6 | 1477 | |
1da177e4 | 1478 | seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address); |
e174961c JB |
1479 | seq_printf(seq, "Current MAC: %pM\n", current_mac); |
1480 | seq_printf(seq, "Firmware MAC: %pM\n", firmware_mac); | |
d7fbeba6 | 1481 | |
1da177e4 | 1482 | seq_printf(seq, "\nAdapter Statistics:\n"); |
a1c5a893 SR |
1483 | seq_printf(seq, " TX: vio_map_single failres: %lld\n", adapter->tx_map_failed); |
1484 | seq_printf(seq, " send failures: %lld\n", adapter->tx_send_failed); | |
1485 | seq_printf(seq, " RX: replenish task cycles: %lld\n", adapter->replenish_task_cycles); | |
1486 | seq_printf(seq, " alloc_skb_failures: %lld\n", adapter->replenish_no_mem); | |
1487 | seq_printf(seq, " add buffer failures: %lld\n", adapter->replenish_add_buff_failure); | |
1488 | seq_printf(seq, " invalid buffers: %lld\n", adapter->rx_invalid_buffer); | |
1489 | seq_printf(seq, " no buffers: %lld\n", adapter->rx_no_buffer); | |
d7fbeba6 | 1490 | |
1da177e4 LT |
1491 | return 0; |
1492 | } | |
1da177e4 LT |
1493 | |
1494 | static int ibmveth_proc_open(struct inode *inode, struct file *file) | |
1495 | { | |
1119d577 | 1496 | return single_open(file, ibmveth_show, PDE(inode)->data); |
1da177e4 LT |
1497 | } |
1498 | ||
d54b1fdb | 1499 | static const struct file_operations ibmveth_proc_fops = { |
1da177e4 LT |
1500 | .owner = THIS_MODULE, |
1501 | .open = ibmveth_proc_open, | |
1502 | .read = seq_read, | |
1503 | .llseek = seq_lseek, | |
1119d577 | 1504 | .release = single_release, |
1da177e4 LT |
1505 | }; |
1506 | ||
1507 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) | |
1508 | { | |
1509 | struct proc_dir_entry *entry; | |
1510 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1511 | char u_addr[10]; |
1512 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
a95609cb DL |
1513 | entry = proc_create_data(u_addr, S_IFREG, ibmveth_proc_dir, |
1514 | &ibmveth_proc_fops, adapter); | |
1515 | if (!entry) | |
1da177e4 | 1516 | ibmveth_error_printk("Cannot create adapter proc entry"); |
1da177e4 | 1517 | } |
1da177e4 LT |
1518 | } |
1519 | ||
1520 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) | |
1521 | { | |
1522 | if (ibmveth_proc_dir) { | |
03a85d09 SL |
1523 | char u_addr[10]; |
1524 | sprintf(u_addr, "%x", adapter->vdev->unit_address); | |
1525 | remove_proc_entry(u_addr, ibmveth_proc_dir); | |
1da177e4 LT |
1526 | } |
1527 | } | |
1528 | ||
1529 | #else /* CONFIG_PROC_FS */ | |
d7fbeba6 | 1530 | static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1531 | { |
1532 | } | |
1533 | ||
d7fbeba6 | 1534 | static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter) |
1da177e4 LT |
1535 | { |
1536 | } | |
1537 | static void ibmveth_proc_register_driver(void) | |
1538 | { | |
1539 | } | |
1540 | ||
1541 | static void ibmveth_proc_unregister_driver(void) | |
1542 | { | |
1543 | } | |
1544 | #endif /* CONFIG_PROC_FS */ | |
1545 | ||
860f242e SL |
1546 | static struct attribute veth_active_attr; |
1547 | static struct attribute veth_num_attr; | |
1548 | static struct attribute veth_size_attr; | |
1549 | ||
1550 | static ssize_t veth_pool_show(struct kobject * kobj, | |
1551 | struct attribute * attr, char * buf) | |
1552 | { | |
d7fbeba6 | 1553 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1554 | struct ibmveth_buff_pool, |
1555 | kobj); | |
1556 | ||
1557 | if (attr == &veth_active_attr) | |
1558 | return sprintf(buf, "%d\n", pool->active); | |
1559 | else if (attr == &veth_num_attr) | |
1560 | return sprintf(buf, "%d\n", pool->size); | |
1561 | else if (attr == &veth_size_attr) | |
1562 | return sprintf(buf, "%d\n", pool->buff_size); | |
1563 | return 0; | |
1564 | } | |
1565 | ||
1566 | static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr, | |
1567 | const char * buf, size_t count) | |
1568 | { | |
d7fbeba6 | 1569 | struct ibmveth_buff_pool *pool = container_of(kobj, |
860f242e SL |
1570 | struct ibmveth_buff_pool, |
1571 | kobj); | |
c7ae011d GKH |
1572 | struct net_device *netdev = dev_get_drvdata( |
1573 | container_of(kobj->parent, struct device, kobj)); | |
4cf1653a | 1574 | struct ibmveth_adapter *adapter = netdev_priv(netdev); |
860f242e SL |
1575 | long value = simple_strtol(buf, NULL, 10); |
1576 | long rc; | |
1577 | ||
1578 | if (attr == &veth_active_attr) { | |
1579 | if (value && !pool->active) { | |
4aa9c93e BK |
1580 | if (netif_running(netdev)) { |
1581 | if(ibmveth_alloc_buffer_pool(pool)) { | |
1582 | ibmveth_error_printk("unable to alloc pool\n"); | |
1583 | return -ENOMEM; | |
1584 | } | |
1585 | pool->active = 1; | |
1586 | adapter->pool_config = 1; | |
1587 | ibmveth_close(netdev); | |
1588 | adapter->pool_config = 0; | |
1589 | if ((rc = ibmveth_open(netdev))) | |
1590 | return rc; | |
1591 | } else | |
1592 | pool->active = 1; | |
860f242e SL |
1593 | } else if (!value && pool->active) { |
1594 | int mtu = netdev->mtu + IBMVETH_BUFF_OH; | |
1595 | int i; | |
1596 | /* Make sure there is a buffer pool with buffers that | |
1597 | can hold a packet of the size of the MTU */ | |
76b9cfcc | 1598 | for (i = 0; i < IbmVethNumBufferPools; i++) { |
860f242e SL |
1599 | if (pool == &adapter->rx_buff_pool[i]) |
1600 | continue; | |
1601 | if (!adapter->rx_buff_pool[i].active) | |
1602 | continue; | |
76b9cfcc BK |
1603 | if (mtu <= adapter->rx_buff_pool[i].buff_size) |
1604 | break; | |
860f242e | 1605 | } |
76b9cfcc BK |
1606 | |
1607 | if (i == IbmVethNumBufferPools) { | |
860f242e SL |
1608 | ibmveth_error_printk("no active pool >= MTU\n"); |
1609 | return -EPERM; | |
1610 | } | |
76b9cfcc | 1611 | |
76b9cfcc BK |
1612 | if (netif_running(netdev)) { |
1613 | adapter->pool_config = 1; | |
1614 | ibmveth_close(netdev); | |
ea866e65 | 1615 | pool->active = 0; |
76b9cfcc BK |
1616 | adapter->pool_config = 0; |
1617 | if ((rc = ibmveth_open(netdev))) | |
1618 | return rc; | |
1619 | } | |
ea866e65 | 1620 | pool->active = 0; |
860f242e SL |
1621 | } |
1622 | } else if (attr == &veth_num_attr) { | |
1623 | if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT) | |
1624 | return -EINVAL; | |
1625 | else { | |
4aa9c93e BK |
1626 | if (netif_running(netdev)) { |
1627 | adapter->pool_config = 1; | |
1628 | ibmveth_close(netdev); | |
1629 | adapter->pool_config = 0; | |
1630 | pool->size = value; | |
1631 | if ((rc = ibmveth_open(netdev))) | |
1632 | return rc; | |
1633 | } else | |
1634 | pool->size = value; | |
860f242e SL |
1635 | } |
1636 | } else if (attr == &veth_size_attr) { | |
1637 | if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE) | |
1638 | return -EINVAL; | |
1639 | else { | |
4aa9c93e BK |
1640 | if (netif_running(netdev)) { |
1641 | adapter->pool_config = 1; | |
1642 | ibmveth_close(netdev); | |
1643 | adapter->pool_config = 0; | |
1644 | pool->buff_size = value; | |
1645 | if ((rc = ibmveth_open(netdev))) | |
1646 | return rc; | |
1647 | } else | |
1648 | pool->buff_size = value; | |
860f242e SL |
1649 | } |
1650 | } | |
1651 | ||
1652 | /* kick the interrupt handler to allocate/deallocate pools */ | |
7d12e780 | 1653 | ibmveth_interrupt(netdev->irq, netdev); |
860f242e SL |
1654 | return count; |
1655 | } | |
1656 | ||
1657 | ||
1658 | #define ATTR(_name, _mode) \ | |
1659 | struct attribute veth_##_name##_attr = { \ | |
7b595756 | 1660 | .name = __stringify(_name), .mode = _mode, \ |
860f242e SL |
1661 | }; |
1662 | ||
1663 | static ATTR(active, 0644); | |
1664 | static ATTR(num, 0644); | |
1665 | static ATTR(size, 0644); | |
1666 | ||
1667 | static struct attribute * veth_pool_attrs[] = { | |
1668 | &veth_active_attr, | |
1669 | &veth_num_attr, | |
1670 | &veth_size_attr, | |
1671 | NULL, | |
1672 | }; | |
1673 | ||
52cf25d0 | 1674 | static const struct sysfs_ops veth_pool_ops = { |
860f242e SL |
1675 | .show = veth_pool_show, |
1676 | .store = veth_pool_store, | |
1677 | }; | |
1678 | ||
1679 | static struct kobj_type ktype_veth_pool = { | |
1680 | .release = NULL, | |
1681 | .sysfs_ops = &veth_pool_ops, | |
1682 | .default_attrs = veth_pool_attrs, | |
1683 | }; | |
1684 | ||
e7a3af5d BK |
1685 | static int ibmveth_resume(struct device *dev) |
1686 | { | |
1687 | struct net_device *netdev = dev_get_drvdata(dev); | |
1688 | ibmveth_interrupt(netdev->irq, netdev); | |
1689 | return 0; | |
1690 | } | |
860f242e | 1691 | |
1da177e4 LT |
1692 | static struct vio_device_id ibmveth_device_table[] __devinitdata= { |
1693 | { "network", "IBM,l-lan"}, | |
fb120da6 | 1694 | { "", "" } |
1da177e4 | 1695 | }; |
1da177e4 LT |
1696 | MODULE_DEVICE_TABLE(vio, ibmveth_device_table); |
1697 | ||
e7a3af5d BK |
1698 | static struct dev_pm_ops ibmveth_pm_ops = { |
1699 | .resume = ibmveth_resume | |
1700 | }; | |
1701 | ||
1da177e4 | 1702 | static struct vio_driver ibmveth_driver = { |
6fdf5392 SR |
1703 | .id_table = ibmveth_device_table, |
1704 | .probe = ibmveth_probe, | |
1705 | .remove = ibmveth_remove, | |
1096d63d | 1706 | .get_desired_dma = ibmveth_get_desired_dma, |
6fdf5392 SR |
1707 | .driver = { |
1708 | .name = ibmveth_driver_name, | |
915124d8 | 1709 | .owner = THIS_MODULE, |
e7a3af5d | 1710 | .pm = &ibmveth_pm_ops, |
6fdf5392 | 1711 | } |
1da177e4 LT |
1712 | }; |
1713 | ||
1714 | static int __init ibmveth_module_init(void) | |
1715 | { | |
1716 | ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version); | |
1717 | ||
1718 | ibmveth_proc_register_driver(); | |
1719 | ||
1720 | return vio_register_driver(&ibmveth_driver); | |
1721 | } | |
1722 | ||
1723 | static void __exit ibmveth_module_exit(void) | |
1724 | { | |
1725 | vio_unregister_driver(&ibmveth_driver); | |
1726 | ibmveth_proc_unregister_driver(); | |
d7fbeba6 | 1727 | } |
1da177e4 LT |
1728 | |
1729 | module_init(ibmveth_module_init); | |
1730 | module_exit(ibmveth_module_exit); |